Clean Air Regulations Causing Global Warming?

According to NASA, it's a distinct possibility that the clean air regulations Washington has imposed over the last three decades have actually contributed to global warming:

Since the 1890s, surface temperatures have risen faster in the Arctic than in other regions of the world. In part, these rapid changes could be due to changes in aerosol levels. Clean air regulations passed in the 1970s, for example, have likely accelerated warming by diminishing the cooling effect of sulfates.

Of course I still think this man-made global warming scare is a crock, but seeing those who think the fate of the world rests in their hands contradicting themselves is always good for a laugh.